Whatsapp backup: Unable to move from windows phone to android

Following instructions found on WhatsApp FAQs I created a backup folder on my SD card of my old windows-based phone. I tried to restore chat history on my new Android phone (LG Leon), with no success. I did the following steps: 1. removed previous WhatsApp installation on Android 2. put the sd card with the backup files (files are in SD card in the WhatsApp/WinPhoneBackup folder) 3. reinstalled WhatsApp 4. reactivated WhatsApp (sms stuff) and asked to recover backup Unfortunately there's no way to allow WhatsApp to discover the backup files. Am I doing something wrong? Some specs: > Source phone: Nokia Lumia 520, Whatsapp version: 2.12.266 > Destination phone: Lg Leon with android 5.0.1, Whatsapp version: 2.12.453